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gecko-dev/extensions/xforms/nsXFormsUploadElement.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla XForms support.
*
* The Initial Developer of the Original Code is
* IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@meer.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsXFormsStubElement.h"
#include "nsIDOMEventTarget.h"
#include "nsIDOM3Node.h"
#include "nsIDOMElement.h"
#include "nsMemory.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsIXTFXMLVisualWrapper.h"
#include "nsIDOMDocument.h"
#include "nsIXFormsControl.h"
#include "nsISchema.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsXFormsAtoms.h"
#include "nsAutoPtr.h"
#include "nsIDOMXPathResult.h"
#include "nsIDOMFocusListener.h"
#include "nsXFormsUtils.h"
#include "nsIModelElementPrivate.h"
#include "nsIContent.h"
#include "nsIDOMXPathExpression.h"
#include "nsNetUtil.h"
static void
ReleaseObject(void *aObject,
nsIAtom *aPropertyName,
void *aPropertyValue,
void *aData)
{
NS_STATIC_CAST(nsISupports *, aObject)->Release();
}
/**
* Implementation of the \<upload\> element.
*/
class nsXFormsUploadElement : public nsXFormsXMLVisualStub,
public nsIDOMFocusListener,
public nsIXFormsControl
{
public:
NS_DECL_ISUPPORTS_INHERITED
// nsIXTFXMLVisual overrides
NS_IMETHOD OnCreated(nsIXTFXMLVisualWrapper *aWrapper);
// nsIXTFVisual overrides
NS_IMETHOD GetVisualContent(nsIDOMElement **aElement);
NS_IMETHOD GetInsertionPoint(nsIDOMElement **aPoint);
// nsIXTFElement overrides
NS_IMETHOD OnDestroyed();
NS_IMETHOD DocumentChanged(nsIDOMDocument *aNewDocument);
NS_IMETHOD ParentChanged(nsIDOMElement *aNewParent);
NS_IMETHOD WillSetAttribute(nsIAtom *aName, const nsAString &aValue);
NS_IMETHOD AttributeSet(nsIAtom *aName, const nsAString &aValue);
// nsIXFormsControl
NS_DECL_NSIXFORMSCONTROL
// nsIDOMEventListener
NS_IMETHOD HandleEvent(nsIDOMEvent *aEvent);
// nsIDOMFocusListener
NS_IMETHOD Focus(nsIDOMEvent *aEvent);
NS_IMETHOD Blur(nsIDOMEvent *aEvent);
nsXFormsUploadElement() : mElement(nsnull) {}
private:
nsCOMPtr<nsIDOMElement> mLabel;
nsCOMPtr<nsIDOMHTMLInputElement> mInput;
nsIDOMElement *mElement;
};
NS_IMPL_ISUPPORTS_INHERITED3(nsXFormsUploadElement,
nsXFormsXMLVisualStub,
nsIXFormsControl,
nsIDOMFocusListener,
nsIDOMEventListener)
// nsIXTFXMLVisual
NS_IMETHODIMP
nsXFormsUploadElement::OnCreated(nsIXTFXMLVisualWrapper *aWrapper)
{
aWrapper->SetNotificationMask(nsIXTFElement::NOTIFY_WILL_SET_ATTRIBUTE |
nsIXTFElement::NOTIFY_ATTRIBUTE_SET |
nsIXTFElement::NOTIFY_DOCUMENT_CHANGED |
nsIXTFElement::NOTIFY_PARENT_CHANGED);
nsCOMPtr<nsIDOMElement> node;
aWrapper->GetElementNode(getter_AddRefs(node));
// It's ok to keep a weak pointer to mElement. mElement will have an
// owning reference to this object, so as long as we null out mElement in
// OnDestroyed, it will always be valid.
mElement = node;
NS_ASSERTION(mElement, "Wrapper is not an nsIDOMElement, we'll crash soon");
// Our anonymous content structure will look like this:
//
// <label> (mLabel)
// <span/> (insertion point)
// <input/> (mInput)
// </label>
nsCOMPtr<nsIDOMDocument> domDoc;
node->GetOwnerDocument(getter_AddRefs(domDoc));
domDoc->CreateElementNS(NS_LITERAL_STRING(NS_NAMESPACE_XHTML),
NS_LITERAL_STRING("label"),
getter_AddRefs(mLabel));
NS_ENSURE_STATE(mLabel);
nsCOMPtr<nsIDOMElement> element;
nsCOMPtr<nsIDOMNode> childReturn;
domDoc->CreateElementNS(NS_LITERAL_STRING(NS_NAMESPACE_XHTML),
NS_LITERAL_STRING("span"),
getter_AddRefs(element));
NS_ENSURE_STATE(element);
mLabel->AppendChild(element, getter_AddRefs(childReturn));
domDoc->CreateElementNS(NS_LITERAL_STRING(NS_NAMESPACE_XHTML),
NS_LITERAL_STRING("input"),
getter_AddRefs(element));
mInput = do_QueryInterface(element);
NS_ENSURE_STATE(mInput);
mInput->SetType(NS_LITERAL_STRING("file"));
mLabel->AppendChild(mInput, getter_AddRefs(childReturn));
// We can't use xtf handleDefault here because editor stops blur events from
// bubbling, and we can't use a system event group handler because blur
// events don't go to the system event group (bug 263240). So, just install
// a bubbling listener in the normal event group. This works out because
// content can't get at the anonymous content to install an event handler,
// and the event doesn't bubble up.
nsCOMPtr<nsIDOMEventTarget> targ = do_QueryInterface(mInput);
NS_ASSERTION(targ, "input must be an event target!");
targ->AddEventListener(NS_LITERAL_STRING("blur"), this, PR_FALSE);
return NS_OK;
}
// nsIXTFVisual
NS_IMETHODIMP
nsXFormsUploadElement::GetVisualContent(nsIDOMElement **aElement)
{
NS_ADDREF(*aElement = mLabel);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsUploadElement::GetInsertionPoint(nsIDOMElement **aPoint)
{
nsCOMPtr<nsIDOMNode> childNode;
mLabel->GetFirstChild(getter_AddRefs(childNode));
return CallQueryInterface(childNode, aPoint);
}
// nsIXTFElement
NS_IMETHODIMP
nsXFormsUploadElement::OnDestroyed()
{
nsCOMPtr<nsIDOMEventTarget> targ = do_QueryInterface(mInput);
if (NS_LIKELY(targ != nsnull)) {
targ->RemoveEventListener(NS_LITERAL_STRING("blur"), this, PR_FALSE);
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsUploadElement::DocumentChanged(nsIDOMDocument *aNewDocument)
{
// We need to re-evaluate our instance data binding when our document
// changes, since our context can change
if (aNewDocument)
Refresh();
return NS_OK;
}
NS_IMETHODIMP
nsXFormsUploadElement::ParentChanged(nsIDOMElement *aNewParent)
{
// We need to re-evaluate our instance data binding when our parent changes,
// since xmlns declarations or our context could have changed.
if (aNewParent)
Refresh();
return NS_OK;
}
NS_IMETHODIMP
nsXFormsUploadElement::WillSetAttribute(nsIAtom *aName, const nsAString &aValue)
{
if (aName == nsXFormsAtoms::bind || aName == nsXFormsAtoms::ref) {
nsCOMPtr<nsIDOMNode> modelNode = nsXFormsUtils::GetModel(mElement);
nsCOMPtr<nsIModelElementPrivate> model = do_QueryInterface(modelNode);
if (model)
model->RemoveFormControl(this);
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsUploadElement::AttributeSet(nsIAtom *aName, const nsAString &aValue)
{
if (aName == nsXFormsAtoms::bind || aName == nsXFormsAtoms::ref) {
Refresh();
}
return NS_OK;
}
// nsIDOMEventListener
NS_IMETHODIMP
nsXFormsUploadElement::HandleEvent(nsIDOMEvent *aEvent)
{
return NS_OK;
}
NS_IMETHODIMP
nsXFormsUploadElement::Focus(nsIDOMEvent *aEvent)
{
return NS_OK;
}
NS_IMETHODIMP
nsXFormsUploadElement::Blur(nsIDOMEvent *aEvent)
{
if (!mInput)
return NS_OK;
nsCOMPtr<nsIDOMNode> modelNode;
nsCOMPtr<nsIDOMElement> bindElement;
nsCOMPtr<nsIDOMXPathResult> result =
nsXFormsUtils::EvaluateNodeBinding(mElement,
nsXFormsUtils::ELEMENT_WITH_MODEL_ATTR,
NS_LITERAL_STRING("ref"),
EmptyString(),
nsIDOMXPathResult::FIRST_ORDERED_NODE_TYPE,
getter_AddRefs(modelNode),
getter_AddRefs(bindElement));
if (!result)
return NS_OK;
nsCOMPtr<nsIDOMNode> singleNode;
result->GetSingleNodeValue(getter_AddRefs(singleNode));
if (!singleNode)
return NS_OK;
nsAutoString value;
mInput->GetValue(value);
// store the file as a property on the selected content node. the submission
// code will read this value.
nsCOMPtr<nsIContent> content = do_QueryInterface(singleNode);
NS_ENSURE_STATE(content);
nsILocalFile *file = nsnull;
NS_NewLocalFile(value, PR_FALSE, &file);
NS_ENSURE_STATE(file);
content->SetProperty(nsXFormsAtoms::uploadFileProperty, file, ReleaseObject);
// update the instance data node. this value is never used by the submission
// code. instead, it exists so that the instance data will appear to be in-
// sync with what is actually submitted.
nsCAutoString spec;
NS_GetURLSpecFromFile(file, spec);
nsXFormsUtils::SetNodeValue(singleNode, NS_ConvertUTF8toUTF16(spec));
return NS_OK;
}
// nsIXFormsControl
NS_IMETHODIMP
nsXFormsUploadElement::Refresh()
{
if (!mInput)
return NS_OK;
nsCOMPtr<nsIDOMNode> modelNode;
nsCOMPtr<nsIDOMElement> bindElement;
nsCOMPtr<nsIDOMXPathResult> result =
nsXFormsUtils::EvaluateNodeBinding(mElement,
nsXFormsUtils::ELEMENT_WITH_MODEL_ATTR,
NS_LITERAL_STRING("ref"),
EmptyString(),
nsIDOMXPathResult::FIRST_ORDERED_NODE_TYPE,
getter_AddRefs(modelNode),
getter_AddRefs(bindElement));
nsCOMPtr<nsIModelElementPrivate> model = do_QueryInterface(modelNode);
// @bug / todo: If \<input\> has binding attributes that are invalid, we
// should clear the content. But the content should be left if the element
// is unbound.
// @see https://bugzilla.mozilla.org/show_bug.cgi?id=265216
if (!model)
return NS_OK;
model->AddFormControl(this);
nsCOMPtr<nsIDOMNode> resultNode;
if (result)
result->GetSingleNodeValue(getter_AddRefs(resultNode));
if (!resultNode)
return NS_OK;
// find out if the control should be made readonly
PRBool isReadOnly = PR_FALSE;
nsCOMPtr<nsIContent> nodeContent = do_QueryInterface(resultNode);
if (nodeContent) {
nsIDOMXPathExpression *expr =
NS_STATIC_CAST(nsIDOMXPathExpression*,
nodeContent->GetProperty(nsXFormsAtoms::readonly));
if (expr) {
expr->Evaluate(mElement,
nsIDOMXPathResult::BOOLEAN_TYPE, nsnull,
getter_AddRefs(result));
if (result) {
result->GetBooleanValue(&isReadOnly);
}
}
}
nsCOMPtr<nsIContent> content = do_QueryInterface(resultNode);
NS_ENSURE_STATE(content);
nsILocalFile *file =
NS_STATIC_CAST(nsILocalFile *,
content->GetProperty(nsXFormsAtoms::uploadFileProperty));
// get the text value for the control
nsAutoString value;
if (file)
file->GetPath(value);
mInput->SetValue(value);
mInput->SetReadOnly(isReadOnly);
return NS_OK;
}
NS_HIDDEN_(nsresult)
NS_NewXFormsUploadElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsUploadElement();
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
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